Notifies the kernel user each time an asynchronous event occurs in generic data link control (GDLC).
#include <sys/gdlextcb.h>
int (*dlc_open_ext.excp_fa)(ext) struct dlc_getx_arg *ext;
The DLC Exception Condition routine notifies the kernel user each time an asynchronous event occurs, such as DLC_SAPD_RES (SAP-disabled) or DLC_CONT_RES (contacted), in GDLC.
| ext | Specifies the same structure for a dlc_getx_arg (get exception) ioctl subroutine. |
| DLC_FUNC_OK | Indicates that the exception has been accepted. |
Note: The function call above has a hidden parameter extension for internal use only, defined as int *chanp, the channel pointer.
Each GDLC supports a subset of the data-received routines. It is critical to performance that the Exception Condition routine for DLC be coded to minimize the amount of time spent prior to returning to the GDLC that called it.
The ioctl subroutine.
Parameter Blocks by ioctl Operation for DLC .
Generic Data Link Control (GDLC) Environment Overview in AIX Version 4.3 Communications Programming Concepts.